Aspect Ratio Calculator

Calculate aspect ratios for images, videos, and screens. Resize dimensions while maintaining proportions.

Width (px)

Height (px)

Aspect Ratio

16:9

Decimal: 1.7778 · 2.07 MP

1920×1080

New Width

→

New Height

720

Lock aspect ratio

Frequently Asked Questions

What is aspect ratio?▼

Aspect ratio is the proportional relationship between width and height. 16:9 means for every 16 units wide, it's 9 units tall.

Why does aspect ratio matter?▼

Maintaining aspect ratio prevents distortion when resizing. Images look stretched or squished if you change dimensions without keeping the ratio.

What ratio is best for YouTube?▼

YouTube standard is 16:9 (1920×1080 for 1080p). YouTube Shorts use 9:16 (1080×1920).

What ratio do social media platforms use?▼

Instagram Feed: 1:1 or 4:5. Stories/Reels: 9:16. Twitter: 16:9. Facebook: 1.91:1. Pinterest: 2:3.